Sensor type testing device

The utility model discloses a sensor type testing device. The testing device includes an anode/cathode power supply, luminescent circuits, relays, a single-pole double-throw switch, and a sensor interface. The two ends of the luminescent circuit are connected with the anode and the cathode of the power supply respectively. Two fixed contacts of the single-pole double-throw switch are connected with the anode and the cathode of the power supply respectively. A moving contact of the single-pole double-throw switch is connected with relay coils. The technical effects of the sensor type testing device are that the type of a sensor can be judged according to the condition of the luminescent circuit after a to-be-tested sensor is connected with the sensor interface of the sensor type testing device and then the single-pole double-throw switch is turned on; the sensor judgment time is shortened from the previous 25 to 40 minutes to 10 seconds, so the working procedure of the maintenance is greatly simplified, and th